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  1. Article ; Online: Comparison of multi-mode Hong-Ou-Mandel interference and multi-slit interference.

    Guo, Yan / Yang, Zi-Xiang / Zeng, Zi-Qi / Ding, Chunling / Shimizu, Ryosuke / Jin, Rui-Bo

    Optics express

    2023  Volume 31, Issue 20, Page(s) 32849–32864

    Abstract: Hong-Ou-Mandel (HOM) interference of multi-mode frequency entangled states plays a crucial role in quantum metrology. However, as the number of modes increases, the HOM interference pattern becomes increasingly complex, making it challenging to ... ...

    Abstract Hong-Ou-Mandel (HOM) interference of multi-mode frequency entangled states plays a crucial role in quantum metrology. However, as the number of modes increases, the HOM interference pattern becomes increasingly complex, making it challenging to comprehend intuitively. To overcome this problem, we present the theory and simulation of multi-mode-HOM interference (MM-HOMI) and compare it to multi-slit interference (MSI). We find that these two interferences have a strong mapping relationship and are determined by two factors: the envelope factor and the details factor. The envelope factor is contributed by the single-mode HOM interference (single-slit diffraction) for MM-HOMI (MSI). The details factor is given by sin (Nx)/sin (x) ([sin (Nv)/sin (v)]
    Language English
    Publishing date 2023-10-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.501645
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Spatial-spectral mapping to prepare frequency entangled qudits.

    Yang, Zi-Xiang / Zeng, Zi-Qi / Tian, Ying / Wang, Shun / Shimizu, Ryosuke / Wu, Hao-Yu / Liu, Shilong / Jin, Rui-Bo

    Optics letters

    2023  Volume 48, Issue 9, Page(s) 2361–2364

    Abstract: Entangled qudits, the high-dimensional entangled states, play an important role in the study of quantum information. How to prepare entangled qudits in an efficient and easy-to-operate manner is still a challenge in quantum technology. Here, we ... ...

    Abstract Entangled qudits, the high-dimensional entangled states, play an important role in the study of quantum information. How to prepare entangled qudits in an efficient and easy-to-operate manner is still a challenge in quantum technology. Here, we demonstrate a method to engineer frequency entangled qudits in a spontaneous parametric downconversion process. The proposal employs an angle-dependent phase-matching condition in a nonlinear crystal, which forms a classical-quantum mapping between the spatial (pump) and spectral (biphotons) degrees of freedom. In particular, the pump profile is separated into several bins in the spatial domain, and thus shapes the down-converted biphotons into discrete frequency modes in the joint spectral space. Our approach provides a feasible and efficient method to prepare a high-dimensional frequency entangled state. As an experimental demonstration, we generate a three-dimensional entangled state by using a homemade variable slit mask.
    Language English
    Publishing date 2023-04-27
    Publishing country United States
    Document type Journal Article
    ISSN 1539-4794
    ISSN (online) 1539-4794
    DOI 10.1364/OL.487300
    Database MEDical Literature Analysis and Retrieval System OnLINE

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